A good line, but free-market zealots parrot that no one enters a transaction unless they want to. But then we get monopolists and mafia in the garbage business and corrupt unions, because they know how to get someone else's buck so well- yet the victims benefit. So, how about:

"No one prospers unless she renders fair benefit to others."

You prosper most, when those around you prosper fairly by your actions. OR even better:

And, overall, I am not sure that the Europeans are doing that bad, even with no capital and burdened by socialism. I doubt they have the same market penetration (what a term) by computer games as in Springfield, but maybe there is something about their lives that is better.

Move? Too bad my only language is English (so the obvious choice is a outlying cloudy frozen island colony of the US, with bad food), and my skills US-centric.